caml-list - the Caml user's mailing list
 help / color / mirror / Atom feed
From: Markus Mottl <markus.mottl@gmail.com>
To: yoann padioleau <padator@wanadoo.fr>
Cc: Caml-list List <caml-list@inria.fr>
Subject: Re: [Caml-list] typing problem with sexplib and mutually recursive  polymorphic types
Date: Wed, 11 Mar 2009 10:20:37 -0400	[thread overview]
Message-ID: <f8560b80903110720u1e13b13fm1324f422c910a2fe@mail.gmail.com> (raw)
In-Reply-To: <21952156.346634.1236751878001.JavaMail.www@wwinf1b03>

On Wed, Mar 11, 2009 at 02:11, yoann padioleau <padator@wanadoo.fr> wrote:
> Yes on this example, but what if I can't move it out because
> the types really need to be mutually recursive ?

I'm afraid, I don't see any straightforward way of achieving this
goal.  If the above were allowed in a truly recursive way, you'd
essentially end up with polymorphic recursion, which is undecidable.

Regards,
Markus

-- 
Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com


  reply	other threads:[~2009-03-11 14:20 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-11  2:45 Yoann Padioleau
2009-03-11  4:25 ` [Caml-list] " Markus Mottl
2009-03-11  6:11   ` yoann padioleau
2009-03-11 14:20     ` Markus Mottl [this message]
2009-03-11 14:32       ` Yitzhak Mandelbaum
2009-03-11 14:44         ` Markus Mottl
2009-03-11 16:16           ` Damien Doligez
2009-03-11 16:43             ` Markus Mottl
2009-03-11 19:03               ` Till Varoquaux
2009-03-12  1:42               ` Jacques Garrigue
2009-03-11 23:08         ` Yoann Padioleau

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=f8560b80903110720u1e13b13fm1324f422c910a2fe@mail.gmail.com \
    --to=markus.mottl@gmail.com \
    --cc=caml-list@inria.fr \
    --cc=padator@wanadoo.fr \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).